// Scintilla source code edit control
/** @file ElapsedPeriod.h
 ** Encapsulate C++ <chrono> to simplify use.
 **/
// Copyright 2018 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.

#ifndef ELAPSEDPERIOD_H
#define ELAPSEDPERIOD_H

namespace Scintilla {

// Simplified access to high precision timing.
class ElapsedPeriod {
  std::chrono::high_resolution_clock::time_point tp;

 public:
  /// Capture the moment
  ElapsedPeriod() noexcept : tp(std::chrono::high_resolution_clock::now()) {
  }
  /// Return duration as floating point seconds
  double Duration(bool reset = false) {
    const std::chrono::high_resolution_clock::time_point tpNow =
        std::chrono::high_resolution_clock::now();
    const std::chrono::duration<double> stylingDuration =
        std::chrono::duration_cast<std::chrono::duration<double>>(tpNow - tp);
    if (reset) {
      tp = tpNow;
    }
    return stylingDuration.count();
  }
};

}  // namespace Scintilla

#endif
